65920617 has 24 divisors (see below), whose sum is σ = 109201664. Its totient is φ = 37537344.

The previous prime is 65920597. The next prime is 65920619. The reversal of 65920617 is 71602956.

65920617 is a `hidden beast` number, since 6 + 592 + 0 + 61 + 7 = 666.

It is not a de Polignac number, because 65920617 - 2¹⁸ = 65658473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65920619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18048 + ... + 21390.

Almost surely, 2^65920617 is an apocalyptic number.

It is an amenable number.

65920617 is a deficient number, since it is larger than the sum of its proper divisors (43281047).

65920617 is a wasteful number, since it uses less digits than its factorization.

65920617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3669 (or 3666 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 65920617 is about 8119.1512487452. The cubic root of 65920617 is about 403.9619139504.

The spelling of 65920617 in words is "sixty-five million, nine hundred twenty thousand, six hundred seventeen".